Chapter V – Roads, sandpits and forest infrastructures
Division III – Bridge, culverts, removable structures and rudimentary structures
§4. General provisions applicable to bridges or culverts
Section 100
Every person authorized to build or improve a culvert must ensure that the end of the conduit or arch extends from the base of the embankment after its stabilization by not more than 300 mm. The foregoing also applies to a person who repairs a culvert. 
1
Objectives
- To ensure the lifespan of a road, bridge or culvert
- To avoid carrying sediment into an aquatic, wetland or riparian environment
- To ensure the free flow of water
Figure 100A End of a conduit or arch extending from the base of the embankment
Except culverts with a reinforced concrete rectangular conduit and wooden culverts, the person must also fill above the conduit or arch of the culvert up to the following height:
- for conduits or arches having a diameter or span of 600 mm or less, up to a height corresponding to the diameter or the span of the conduit or the arch divided by 4, plus 300 mm;
- for conduits or arches having a diameter or span of more than 600 mm to 3,600 mm, up to a height corresponding to the diameter or the span of the conduit or the arch divided by 4, with a minimum of 600 mm;
- for conduits or arches having a diameter or span greater than 3,600 mm, up to a height of at least 1,500 mm.
2
Objectives
- To ensure the lifespan of a road, bridge or culvert
- To ensure the safety of forest road users
Figure 100B Minimum thickness of fill above a conduit or arch, based on its diameter or span
For a wooden culvert, the person must fill above the arch to a minimum height of 300 mm up to a maximum of 1,000 mm.
3
Objectives
- To ensure the lifespan of a road, bridge or culvert
- To ensure the safety of forest road users
